The table lists the measured rates for the reversible reaction X ⇌ Y

CHEMISTRY · Single correct · A Level · Chemistry · Chemical equilibria (Le Chatelier’s principle and Kc) · Chemical equilibria (Le Chatelier’s principle and Kc)

Problem

The table lists the measured rates for the reversible reaction X ⇌ Y. Time (s) | Rate_forward (mol·L⁻¹·s⁻¹) | Rate_reverse (mol·L⁻¹·s⁻¹) 10 | 0.68 | 0.14 20 | 0.54 | 0.24 30 | 0.42 | 0.34 40 | 0.32 | 0.32 50 | 0.24 | 0.24 60 | 0.18 | 0.28 At which recorded time is the system first at equilibrium? (a) 60 s60\ \text{s} (b) 30 s30\ \text{s} (c) 40 s40\ \text{s} (d) 50 s50\ \text{s}

Related theory

Browse the problem library